Introduction to Data Communications (S1, 2014)

Transmission Media

Lecture Material

Lecture Notes: View, Print, Source
Path loss model and conversion to dB: View, Source
IPSTAR satellite example View, Print, Source. See the websites for IPSTAR and ThaiCom for more technical details.
Antenna gain concepts: View, Print, Source

Readings

Stallings: chapter 4
Forouzan: chapter 7
Kurose: none

Videos

This year: Spectrum and Guided Media, Antennas and Antenna Gain, Free Space Path Loss
Last year: Part 1, Part 2

Notes

US Frequency Allocation Chart showing the applications/users of frequencies from 3kHz to 300 GHz.
Cisco antennas reference guide, giving examples of antenna specifications for WiFi, as well as explanation of antenna and propagation concepts
Notes from the lecture are below. Hover over the image to see a description; right-click and view the image to zoom in. Alternatively you can download a zip archive of all the image or a printable PDF of the notes.

Signals at different centre frequencies (channels) Bandwidth of twisted pair, coaxial cable and optical fibre Propagation speed in cables Antenna gain vs isotropic antenna Antenna gain of a parabolic antenna Path Loss Model using Factors and dB Path Loss and Receive Sensitivity Free Space Path Loss Equation Free Space Path Loss Example

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